Respostas

2013-12-04T18:38:02-02:00
x²+2x-8
Resolvendo pelo Bhaskara, temos:
Δ=6

x'= -2 +6/2
x'=2
x''= -2-6/2
x''=-4
S: [-4,2]

Espero ter ajudado'
1 5 1
2013-12-04T18:41:16-02:00
X2 + 2x -8 =0

logo:

X . X + 2X = 8
4X = 8
x = 8/4
x= 2